Multi-chambered bottle with metering stage, pour spout and cap

ABSTRACT

A multi-chambered bottle includes first and second chambers, a metering stage, a pour spout and a cap. The metering stage includes first and second metering stage sections connectable to respective mouths of the first and second chambers. Each metering stage section comprises a nozzle having a liquid inlet orifice and a liquid outlet orifice, and a vent tube having an air inlet orifice and an air outlet orifice at opposite ends of the vent tube, the air inlet orifice to be disposed outside of the respective chamber and the air outlet orifice to be disposed inside of the respective chamber, the vent tube disposed relative to the nozzle such that a line crossing a center of the air inlet orifice and a center of the liquid outlet orifice forms an acute angle with a normal axis of the bottle.

FIELD OF THE INVENTION

The present disclosure relates generally to a bottle for holding and dispensing liquids. In particular, the present disclosure relates to a bottle with a metering stage, pour spout and cap.

BACKGROUND

In the dispensing of modern liquid products, keeping components of a liquid product separate until just before dispensing the components into the final product may be desirable. For example, keeping two components of a mouthwash separate prior to dispensing the product may be necessary to prevent undesirable, premature reaction of the components. Other consumer products examples where keeping ingredients separate may be desirable include surfactant and conditioner ingredients in shampoos and surfactant and moisturizer ingredients in shower gels.

In some cases it is not only important that the components meet only after they have exited the bottle, but also that one component does not contaminate another within the bottle. After dispensing, some residue of one or another component may remain in the dispensing area of the bottle. This may create a risk of cross-contamination where one liquid component may enter the chamber in which another liquid is kept.

In some applications the specific ratio of one component to another may be important for the final product to be effective and not be too diluted or concentrated. Conventionally, metering of the ratio of one component to another is a challenge particularly because, since the bottle is tipped for dispensing by a user, the tipping angle of the bottle is highly uncontrolled.

Therefore, a need exists for an improved multi-chambered bottle that a) dispenses separately stored components for them to mix into a single product stream, b) reduces or eliminates the risk of cross-contamination, c) accurately meters the ratio of one component to the other regardless of the tipping angle, and d) may be manufactured cost-effectively.

SUMMARY OF THE INVENTION

This disclosure provides a multi-chambered bottle that includes first and second chambers, a metering stage, a pour spout and a cap. The particular design of the metering stage and the pour spout encourages smooth liquid flow so that the liquid components may dispense separately. In one embodiment, at least two of the liquid components mix “in the air” into a single product stream prior to landing in an application container. The particular design of the metering stage and the pour spout also encourages fluid flow exclusively in the outward direction and discourages the component liquids from reentering the chambers to prevent self-contamination and/or cross-contamination. The particular design of the metering stage and the pour spout also accurately meters the ratio of one component to another regardless of the tipping angle. The multi-chambered bottle of the present disclosure may also be manufactured cost effectively.

These and further features of the present invention will be described with reference to the attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the invention may be employed, but it is understood that the invention is not limited correspondingly in scope. Rather, the invention includes all changes, modifications and equivalents coming within the terms of the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate various example systems, methods, and so on, that illustrate various example embodiments of aspects of the invention. It will be appreciated that the illustrated element boundaries (e.g., boxes, groups of boxes, or other shapes) in the figures represent one example of the boundaries. One of ordinary skill in the art will appreciate that one element may be designed as multiple elements or that multiple elements may be designed as one element. An element shown as an internal component of another element may be implemented as an external component and vice versa. Furthermore, elements may not be drawn to scale.

FIG. 1A illustrates a front perspective view of an exemplary multi-chambered bottle.

FIGS. 1B-1G respectively illustrate front, left side, right side, rear, top and bottom views of the exemplary multi-chambered bottle of FIG. 1A.

FIG. 1H illustrates a cross-sectional view of the exemplary multi-chambered bottle taken along line IH-IH of FIG. 1C.

FIG. 1I illustrates a cross-sectional view of the exemplary multi-chambered bottle taken along line II-II of FIG. 1B.

FIG. 2A illustrates a front perspective view of an exemplary multi-chambered bottle without its cap.

FIGS. 2B-2G respectively illustrate front, left side, right side, rear, top and bottom views of the exemplary multi-chambered bottle of FIG. 2A.

FIG. 2H illustrates a rear perspective view of the exemplary multi-chambered bottle of FIG. 2A.

FIG. 3A illustrates a front perspective view of an exemplary multi-chambered bottle without its cap or pour spout.

FIGS. 3B-3G respectively illustrate front, left side, right side, rear, top and bottom views of the exemplary multi-chambered bottle of FIG. 3A.

FIG. 4A illustrates a front perspective view of an exemplary multi-chambered bottle without its cap, pour spout or sealing cover.

FIGS. 4B-4G respectively illustrate front, left side, right side, rear, top and bottom views of the exemplary multi-chambered bottle of FIG. 4A.

FIG. 5A illustrates a front perspective view of an exemplary multi-chambered bottle without its cap or sealing cover.

FIGS. 5B-5G respectively illustrate front, left side, right side, rear, top and bottom views of the exemplary multi-chambered bottle of FIG. 5A.

FIG. 5H illustrates a rear perspective view of the exemplary multi-chambered bottle of FIG. 5A.

FIG. 6 illustrates a cross-sectional view of the exemplary multi-chambered bottle taken along line VI-VI of FIG. 5D.

FIG. 7 illustrates a cross-sectional view of the exemplary multi-chambered bottle taken along line VII-VII of FIG. 5H.

FIG. 8A illustrates a magnified top view of a first exemplary multi-chambered bottle of FIG. 4A.

FIG. 8B illustrates a magnified top view of a second exemplary multi-chambered bottle of FIG. 4A.

FIGS. 9 and 10 illustrate perspective views of the exemplary multi-chambered bottle to illustrate pouring angles.

FIG. 11A illustrates a front perspective view of an exemplary multi-chambered bottle without the sealing cover.

FIGS. 11B-11G respectively illustrate front, left side, right side, rear, top and bottom views of the exemplary multi-chambered bottle of FIG. 11A.

DETAILED DESCRIPTION

FIGS. 1A-11G illustrate various views of an exemplary multi-chambered bottle 1. For ease of illustration, as shown in FIG. 1A we define a) a lateral center plane LAT, including a lateral axis x and a longitudinal axis y, that cuts the bottle 1 into front and back portions, and b) a normal center plane NOR, including a normal axis z and the longitudinal axis y, that cuts the bottle 1 into left and right portions.

FIGS. 1A-1G illustrate the bottle 1 in a configuration in which the bottle 1 may be sold or stored prior to sale or distribution. The bottle 1 includes two chambers 2 a and 2 b that may hold respective liquids to be poured and mixed. The bottle 1 also includes a pour spout 3 that, as described in detail below, assists in pouring and mixing of the liquids from the chambers 2 a and 2 b. Although, for purposes of explanation, the bottle 1 is disclosed herein as including two chambers 2 a and 2 b, in some embodiments, the bottle 1 may include more than two chambers. Further, while the bottle 1 is disclosed herein as a single bottle 1 including two chambers 2 a and 2 b, in some embodiments, the bottle 1 may be a unit that incorporates two or more bottles joined together.

In the illustrated embodiment, the first and second chambers 2 a and 2 b are separated by the normal-center plane NOR. The chamber 2 a includes at least one wall that slopes in a direction towards the normal-center plane NOR of the bottle 1 as it extends from a base 18 a to a shoulder 17 a of the chamber 2 a. The chamber 2 b includes at least one wall that slopes in a direction towards the normal-center plane NOR of the bottle 1 as it extends from a base 18 b to a shoulder 17 b of the chamber 2 b. In other embodiments, the chambers 2 a and 2 b may be of different shapes from those illustrated.

FIGS. 1H and 1I illustrate cross-sectional views of the exemplary multi-chambered bottle taken along line IH-IH of FIG. 1C and line II-II of FIG. 1B, respectively. In the illustrated embodiment of FIGS. 1H and 1I, the first and the second chambers 2 a and 2 b each includes a first nesting portion 2 aa, 2 ba that protrudes from the respective chamber and a second nesting portion 2 ab, 2 bb that accepts the first nesting portion of the opposite chamber. This prevents the chambers from shifting front to back relative to each other. In one embodiment (not shown), the bottle 1 includes only one set of protruding and accepting nesting portions while, in another embodiment (not shown), the bottle 1 includes more than two sets of protruding and accepting nesting portions. Although in the illustrated embodiment of FIGS. 1H and 1I the nesting portions 2 aa, 2 ab, 2 ba, 2 bb are shown as partial spheres of a particular size, these portions may have any other shape and/or size that prevents the chambers from shifting front to back relative to each other.

In one embodiment, the chambers 2 a and 2 b are separately constructed and connected together by shrink or labeling wrapping around the bottle 1. In another embodiment (not shown), the bottle 1 includes a clip installed near the bases 18 a and 18 b of the chambers 2 a and 2 b that together with other components of the bottle 1 such as the spout 3 and a metering stage 6 (see FIG. 3A) keep the chambers 2 a and 2 b together. In yet another embodiment, the chambers 2 a and 2 b are constructed integrally with one another.

The bottle 1 also includes a cap 4 that, as also described in more detail below, prevents the liquids from exiting the bottle 1 during storage after a first use. As also described in more detail below, the cap 4 may also serve as a container into which the mixture of the two liquids may be poured. The cap 4 is removably attached to the bottle 1.

FIGS. 2A-2H illustrate the bottle 1 without the cap 4, which has been removed. As described in more detail below, the pour spout 3 includes first and second pouring channels 5 a and 5 b through which liquid from the chambers 2 a and 2 b, respectively, may flow out of the bottle 1. The pour spout 3 may be removably attached to the bottle 1.

FIGS. 3A-3G illustrate the bottle 1 without the pour spout 3, which has been removed. The bottle 1 includes a metering stage 6 that is connected to the chambers 2 a and 2 b at the mouths 8 a and 8 b, respectively. As described in more detail below, the metering stage 6 plays a significant role in controlling liquid flow from the chambers 2 a and 2 b.

When first purchased, the bottle 1 may include at least one safety cover or seal 7 that must be removed prior to dispensing of the liquids from the chambers 2 a and 2 b. A user may gain access to the seal 7 and thus remove it by first removing the cap 4 and then the spout 3. In the illustrated embodiment, the cover 7 is a plastic cover that removably attaches to the metering stage 6 and effectively covers liquid outlets 9 a and 9 b and air inlet orifices 10 a and 10 b of the metering stage 6 to prevent fluid flow through the metering stage 6. Prior to use and when the bottle 1 is on a shelf of a retail store, for example, the safety cover 7 acts as a spacer between the pour spout and the metering stage. In use, the spacer is removed and the spout engages and drops down onto the metering stage.

In another embodiment, the bottle 1 includes a cover in the form of a safety foil that covers the orifices of the metering stage 6. In yet another embodiment, the bottle 1 includes both the plastic cover 7 and a safety foil to cover the orifices of the metering stage 6. In another embodiment (not shown), the bottle 1 includes a cork stopper that covers the orifices of the metering stage 6.

FIGS. 4A-4G illustrate the bottle 1 without the cover 7, which has been removed. The metering stage 6 includes first and second metering stage sections 6 a and 6 b that are separated by the normal-center plane NOR. Each of the metering stage sections 6 a and 6 b corresponds to a respective one of the first and second chambers 2 a and 2 b and is connectable to a respective one of the mouths 8 a and 8 b of the first and second chambers 2 a and 2 b. The metering stage 6 includes nozzles 9 a and 9 b and vent tubes 10 a and 10 b, which are described in more detail below. In the illustrated embodiment, the metering stage sections 6 a and 6 b are joined by a bridge 6 c. In another embodiment (not shown), the metering stage sections 6 a and 6 b are separate from one another and are therefore not joined.

After removal of the cover 7, the pour spout 3 may be reattached to the bottle 1. In the illustrated embodiment of FIGS. 4A-4G, the metering stage 6 includes a guide tab 11 disposed between the metering stage sections 6 a and 6 b. The pour spout 3 has a surface corresponding to the guide tab 11 such that the guide tab 11 contacts the surface of the pour spout 3 and assists in aligning the pour spout 3 and the metering stage 6 when the pour spout 3 is being reattached to the bottle 1.

FIGS. 5A-5H illustrate the bottle 1 with the pour spout 3 reattached to the bottle 1. FIG. 6 illustrates a cross section of the bottle 1 (as shown in FIG. 5D). Notice the contrast between FIGS. 5A-5H and FIGS. 2A-2H and the contrast between FIGS. 11A-11G and FIGS. 1A-1G. FIGS. 1A-1G illustrate the bottle 1 prior to sale as it sits on the shelf. The cover 7 acts as a spacer between the pour spout 3 and the metering stage 6. As a result, FIGS. 1A-1G and FIGS. 2A-2H show a gap G between the pour spout 3 and the chambers 2 a and 2 b that exposes the shoulders 17 a and 17 b of the chambers 2 a and 2 b. The gap G is due to the space occupied by the cover 7 between the pour spout 3 and the metering stage 6. In contrast, because the cover 7 has been removed, FIGS. 11A-11G and FIGS. 5A-5H show no gap between the pour spout 3 and the chambers 2 a and 2 b and, thus, the shoulders 17 a and 17 b of the chambers 2 a and 2 b are no longer exposed. FIG. 7 illustrates another cross section of the bottle 1 (as shown in FIG. 5H). FIGS. 8A and 8B illustrate top views of the bottle 1 with the pour spout 3 removed.

The metering stage section 6 a includes the nozzle 9 a and the vent tube 10 a, while the metering stage section 6 b includes the nozzle 9 b and the vent tube 10 b. For ease of explanation the description below describes mainly the metering stage section 6 a, but in general the description below is also applicable to the metering stage section 6 b, the nozzle 9 b and the vent tube 10 b.

The nozzle 9 a has a liquid inlet orifice 11 a and a liquid outlet orifice 12 a. In the illustrated embodiment, the nozzle 9 a includes a frustroconical portion 13 a that tapers to the liquid outlet orifice 12 a as it extends away from the liquid inlet orifice 11 a along the longitudinal axis y. The nozzle 9 a also includes a rim portion 14 a that surrounds the frustroconical portion 13 a. In the illustrated embodiment, the rim portion 14 a includes a tubular wall that surrounds or intersects the widest end of the frustroconical portion 13 a. In other embodiments, the rim portion 14 a may include walls of geometries other than tubular (e.g., square, rectangle, etc.)

The particular shape of the nozzles 9 a and 9 b encourages liquid flow in the outward direction away from the chambers 2 a and 2 b and discouraged liquids from entering the chamber 2 a and 2 b through the nozzle 9 a and 9 b. Moreover, the rim portions 14 a and 14 b surrounding the frustroconical portions 13 a and 13 b serve to, in effect, pool or trap any residue liquid in the general area of the respective nozzle 9 a or 9 b between the frustroconical portions 13 a and 13 b and the rim portions 14 a and 14 b outside of the respective chamber 2 a or 2 b to avoid self-contamination and/or cross-contamination.

The vent tube 10 a has an air inlet orifice 15 a and an air outlet orifice 16 a at opposite ends of the vent tube 10 a. The air inlet orifice 15 a is disposed outside of the chamber 2 a and the air outlet orifice 16 a is disposed inside of the chamber 2 a so that air may enter the chamber 2 a through the vent tube 10 a as liquid exits the chamber 2 a through the nozzle 9 a.

As shown in the embodiment of FIG. 7, the liquid outlet orifice 12 a of the nozzle 9 a and the air inlet orifice 15 a of the vent tube 10 a are substantially flush or even with each other; i.e., the liquid outlet orifice 12 a and the air inlet orifice 15 a are approximately disposed at a same longitudinal distance (i.e., distance along the longitudinal axis y) from any point. For example, the liquid outlet orifice 12 a and the air inlet orifice 15 a are disposed at the same longitudinal distance d1 from a main body of the metering stage section 6 a or from the base 18 a of the chamber 2 a, etc.

Regarding length of the vent tubes 10 a and 10 b, in general, longer vent tubes (or more specifically a longer distance d3 from the liquid outlet orifice 12 a of the nozzle 9 a to the air outlet orifice 16 a of the vent tube 10 a along the longitudinal axis y) would promote faster flow of air into the chambers 2 a and 2 b and thus faster flow of liquid from the chambers 2 a and 2 b. Similarly, in general, shorter vent tubes would promote slower flow of air into the chambers 2 a and 2 b and thus slower flow of liquid from the chambers 2 a and 2 b. In general, the vent tubes 10 a and 10 b need to be long enough to, upon tipping of the bottle 1, achieve sufficient pressure between the air outlet orifices 16 a and 16 b and the liquid outlet orifices 12 a and 12 b to overcome forces retaining the liquids in the chambers 2 a and 2 b and allow the liquids to flow from the bottle 1. Thus, the length of the vent tube 10 a controls the start of the pour from the chamber 2 a (i.e., how fast after tipping liquid from the chamber 2 a pours). Similarly, the length of the vent tube 10 b controls the start of the pour from the chamber 2 b (i.e., how fast after tipping liquid from the chamber 2 b pours). Therefore, the difference or ratio between the lengths of the vent tubes 10 a and 10 b may be used to control how soon liquid from one chamber pours relative to liquid from another chamber. But, the length of the chambers 2 a and 2 b as well as other manufacturing considerations may limit the practical length of the vent tubes 10 a and 10 b.

In the illustrated embodiment of FIG. 7, a distance d3 from the liquid outlet orifice 12 a of the nozzle 9 a to the air outlet orifice 16 a of the vent tube 10 a along the longitudinal axis y of the bottle 1 corresponds to about 35% of the height (i.e., distance d4 from the shoulder 17 a to the base 18 a) of the chamber 2 a. In other embodiments, the distance d3 from the liquid outlet orifice 12 a to the air outlet orifice 16 a along the longitudinal axis y corresponds to at least one of 10% of the height of the chamber 2 a, 20% of the height of the chamber 2 a, 30% of the height of the chamber 2 a, 40% of the height of the chamber 2 a, from 25% to 33% of the height of the chamber 2 a, from 20% to 40% of the height of the chamber 2 a, from 10% to 60% of the height of the chamber 2 a, and from 5% to 90% of the height of the chamber 2 a.

Another dimension that influences the flow rate of liquid is the location of the air inlet orifices 15 a and 15 b of the vent tubes 10 a and 10 b relative to the liquid outlet orifices 12 a and 12 b of the nozzles 9 a and 9 b along the lateral x and normal z axes.

As shown in FIGS. 8A and 8B, the vent tube 10 a is disposed relative to the nozzle 9 a such that a line La crossing a center of the air inlet orifice 15 a and a center of the liquid outlet orifice 12 a forms an acute angle α with a line za crossing the center of the liquid outlet orifice 12 a and parallel to the axis z normal to the bottle 1. In the illustrated embodiments of FIGS. 8A and 8B the angle α is approximately 27°. In another embodiment, the angle α is 25°. In yet another embodiment, the angle α is 35°. In one embodiment, the angle α is 45°. In another embodiment, the angle α is 54°. In yet another embodiment, the angle α is 60°. In one embodiment, the angle α is between 20° and 30°. In another embodiment, the angle α is between 10° and 50°. In yet another embodiment, the angle α is between 5° and 85° inclusive. In one embodiment, the angle α is −25°. In another embodiment, the angle α is −27°. In yet another embodiment, the angle α is −35°. In one embodiment, the angle α is −45°. In another embodiment, the angle α is −54°. In yet another embodiment, the angle α is −60°. In one embodiment, the angle α is between −20° and −30°. In another embodiment, the angle α is between −10° and −50°. In yet another embodiment, the angle α is between −5° and −85° inclusive.

Similarly, the vent tube 10 b is disposed relative to the nozzle 9 b such that a line Lb crossing a center of the air inlet orifice 15 b and a center of the liquid outlet orifice 12 b forms an acute angle β with a line zb crossing the center of the liquid outlet orifice 12 b and parallel to the axis z normal to the bottle 1. In the illustrated embodiment of FIG. 8A the angle β is approximately 27°. In another embodiment, the angle β is 25°. In yet another embodiment, the angle β is 35°. In one embodiment, the angle β is 45°. In another embodiment, the angle β is 54°. In yet another embodiment, the angle β is 60°. In one embodiment, the angle β is between 20° and 30°. In another embodiment, the angle β is between 10° and 50°. In yet another embodiment, the angle β is between 5° and 85° inclusive. In one embodiment, the angle β is −25°. In another embodiment, the angle β is −27°. In yet another embodiment, the angle β is −35°. In one embodiment, the angle v is −45°. In another embodiment, the angle β is −54°. In yet another embodiment, the angle β is −60°. In one embodiment, the angle β is between −20° and −30°. In another embodiment, the angle β is between −10° and −50°. In yet another embodiment, the angle |3 is between −5° and −85° inclusive.

In the illustrated embodiment shown in FIG. 8A, the acute angle α of the metering stage section 6 a is the same angle as the corresponding angle β of the metering stage section 6 b. In the embodiment shown in FIG. 8B, the acute angle α of the metering stage section 6 a is different from the corresponding angle β′ of the metering stage section 6 b.

Also, in the illustrated embodiment, a distance d2 a from the center of the liquid outlet orifice 12 a to the center of the air inlet orifice 15 a corresponds to at least one of 5% of the length of the vent tube 10 a, 10% of the length of the vent tube 10 a, 15% of the length of the vent tube 10 a, 20% of the length of the vent tube 10 a, 25% of the length of the vent tube 10 a, 33% of the length of the vent tube 10 a 50% of the length of the vent tube 10 a, from 10% to 25% of the length of the vent tube 10 a, and from 5% to 50% of the length of the vent tube 10 a. Similarly, a distance d2 b from the center of the liquid outlet orifice 12 b to the center of the air inlet orifice 15 b corresponds to at least one of 5% of the length of the vent tube 10 b, 10% of the length of the vent tube 10 b, 15% of the length of the vent tube 10 b, 20% of the length of the vent tube 10 b, 25% of the length of the vent tube 10 b, 33% of the length of the vent tube 10 b 50% of the length of the vent tube 10 b, from 10% to 25% of the length of the vent tube 10 b, and from 5% to 50% of the length of the vent tube 10 b.

As shown in the embodiment of FIG. 7, the air outlet orifice 16 a is formed by a flange 19 a expanding radially inwards from a wall of the vent tube 10 a. The flange 19 a reduces the diameter of the air outlet orifice 16 a relative to the inner diameter of the vent tube 10 a adjacent to the flange 19 a which provides additional control over liquid flow.

Characteristics (location, dimensions, orifice 12 a size, etc.) of the nozzle 9 a relative to the nozzle 9 b, characteristics (location, dimensions, orifice 12 b size, etc.) of the vent tube 10 a relative to the vent tube 10 b, the angle α relative to the angle β, and the distance d2 a relative to the distance d2 b may all be manipulated to control liquid flow from the chamber 2 a relative to the chamber 2 b. For example, these variables may be used to control liquid flow as to provide a 50%-50% ratio of liquids regardless of the characteristics (density, surface tension, etc.) of the liquids. In another example, these variables may be used to control liquid flow as to provide ratios other than 50%-50% for liquids having similar characteristics. Also, the specific construction of the vent tubes 10 a and 10 b and their specific location relative to the nozzles 9 a and 9 b may be used to promote an even start to liquid flow between the two liquids from the chambers 2 a and 2 b regardless of the characteristics of the liquids and the pouring angle or rotation of the bottle 1.

For example, reducing the diameter of the liquid orifice 12 a, 12 b corresponding to one chamber 2 a, 2 b will reduce the 50%-50% ratio in favor of the liquid in the opposing chamber 2 a, 2 b. Correspondingly, increasing or decreasing both orifices 12 a and 12 b simultaneously can, respectively, increase or decrease the overall flow rate while maintaining a constant mixture ratio. If the desired ratio is other than 50%-50%, in order to change the flow rate while keeping the ratio unchanged, the absolute changes to the orifice diameter will not be identical between the two chambers 2 a, 2 b.

Adjusting the vent tube length d3 to be shorter will, in general, delay the start of the pour once the bottle 1 is tipped. Adjusting the tube 10 to be excessively short will results in making the flow start and stability unreliable. Adjusting the tube 10 to be excessively long may have adverse effects on manufacturability and end assembly cost.

When pouring the bottle 1 off-axis (i.e., the chamber 2 a is higher or lower with respect to the direction of gravity than the chamber 2 b), increasing the angle α or the angle β of FIGS. 8A and 8B generally will cause liquid to flow from the chamber that is higher to begin flow prior to flow from the chamber that is lower.

In general, liquids with higher viscosities will require a larger liquid orifice 12 a, 12 b to achieve the same flow rate of a less viscous liquid (i.e., all else being equal).

In general, liquids with a high surface energy will require a small vent orifice 16 a, 16 b to maintain an identical pouring start time as compared to a liquid with lower surface energy (i.e., all else being equal).

FIGS. 5A-5H, 6 and 7 provide additional detail regarding the pour spout 3. The pour spout 3 includes the first and second pouring channels 5 a and 5 b. Each of the pouring channels 5 a and 5 b corresponds to a respective one of the nozzles 9 a and 9 b of the first and second metering stage sections 6 a and 6 b. The pouring channels 5 a and 5 b include liquid inlets 20 a and 20 b and liquid outlets 21 a and 21 b, respectively. For ease of explanation the description below describes mainly the pouring channel 5 a, the liquid inlet 20 a and the liquid outlet 21 a, but in general the description below is also applicable to the pouring channel 5 b, the liquid inlet 20 b and the liquid outlet 21 b.

The liquid inlet 20 a connects to the respective nozzle 9 a such that liquid may flow from the nozzle 9 a, enter the pouring channel 5 a through the liquid inlet 20 a and exit the pouring channel 5 a through the liquid outlet 21 a.

In many applications for the multi-chambered bottle 1 it may be important that the two liquids meet a short distance from the liquid outlets 21 a and 21 b and that they mix “in the air” prior to landing in a receiving container such as the cap 4. For example, combining and substantially mixing the streams of liquids in the air upon dispensing may avoid having to mix the liquids in the cap 4 after pouring.

To this end, at least a portion of a wall 22 a of the pouring channel 5 a slopes in a direction towards the normal-center plane NOR of the bottle 1 as it extends from the liquid inlet 20 a to the liquid outlet 21 a (see FIG. 6). This pushes at least some of the liquid flowing through the pouring channel 5 a towards the normal-center plane NOR of the bottle 1. Moreover, the liquid outlet 21 a narrows as it extends away from the normal-center plane NOR along the latitudinal axis x (see FIG. 5A). This causes liquid flowing from the pouring channel 5 a to bridge or web at the narrowing, further pushing the liquid to flow from the liquid outlet 21 a towards the normal-center plane NOR. This, in effect, causes liquid to flow from the liquid outlet 21 a of the pouring channel 5 a towards liquid flowing from the liquid outlet 21 b of the pouring channel 5 b. This causes the liquids to meet a short distance from the liquid outlets 21 a and 21 b and to mix “in the air” prior to landing in a receiving container such as the cap 4.

In many applications for the multi-chambered bottle 1 it may be important that the two liquids meet only after they have exited the bottle 1 and that one liquid does not contaminate itself or another liquid within the bottle 1.

To this end, the pouring channels 5 a and 5 b include stepped rims 23 a and 23 b that surround at least a portion of the perimeter of the liquid outlets 21 a and 21 b, respectively. The pouring channels 5 a and 5 b also include dividers 24 a and 24 b disposed adjacent a portion of the liquid outlets 21 a and 21 b nearest to the normal-center plane NOR of the bottle 1. Any residue liquid in the vicinity of the liquid outlets 21 a and 21 b will tend to pool at the steps of the rims 23 a and 23 b. Any residue liquid that may begin to flow towards the opposite liquid outlet along the stepped rims 23 a and 23 b will be stopped from reaching the opposite liquid outlet by the corresponding divider 24 a or 24 b.

In addition, at least a portion of the wall 22 a of the pouring channel 5 a slopes in a direction away from the latitudinal-center plane LAT of the bottle 1 as it extends from the liquid inlet 20 a to the liquid outlet 21 a. This reduces the angle that the bottle 1 must be tipped to cause liquid to pour from the spout 3.

FIGS. 9 and 10 illustrate the exemplary multi-chambered bottle 1 tilted to pour liquids from the chambers 2 a and 2 b. Upon tilting of the bottle 1, the liquids flow assisted by gravity from their respective chambers 2 a, 2 b and out of the pour spout 3. In the illustrated embodiment, the spout 6 includes a grip 3 a that corresponds to a finger of a user. When pouring the bottle 1, ideally the chambers 2 a and 2 b would be even with respect to the direction of gravity; i.e., the chamber 2 a would not be higher or lower than the chamber 2 b. The bottle 1, however, performs adequately within a range of angles different from even. The grip 3 a is configured to promote that the user tilts the bottle 1 such that the chambers 12 a and 12 b remain within this range. When the user tilts the bottle 1 with his finger on the grip 3 a, the grip 3 a performs together with the hand of the user to promote the user to tilt the bottle 1 within the range. In one embodiment, the grip 3 a performs to promote the user to tilt the bottle 1 a range of angles within 45 degrees of the ideal position where the chambers 2 a and 2 b would be even with respect to the direction of gravity; i.e., the grip 3 a performs to promote the user to tilt the bottle 1 such that the angle formed by a line perpendicular to the direction of gravity and the line x (see FIGS. 8A and 8B) is within a range of 0 to 45 degrees inclusive.

Construction of the bottle 1 including the specific constructions of the pour spout 3 and the metering stage 6 as disclosed above permits the bottle 1 to be tilted and even twisted at various angles of every axis x, y or z without substantial degradation to the flow ratios of the liquid in the first chamber 2 a relative to the liquid in the second chamber 2 b and without cross-contamination.

FIGS. 11A-11G illustrate the exemplary bottle 1 in storage configuration after the first use. The cap 4 has been reinstalled on the bottle 1. The interface of the cap 4 with the spout 3 is shaped to substantially seal the spout 3 when the cap 4 is installed on the bottle 1. Portions of the cap 4 correspond to the liquid outlets 21 a and 21 b of the pour spout 3 including the stepped rims 23 a and 23 b and the dividers 24 a and 24 b. Thus when the cap 4 is installed on the bottle 1 these portions of the cap 4 impede liquid flow through the liquid outlets 21 a and 21 b of the pour spout 3.

In one embodiment, the cap 4, when not installed on the bottle 1, may be used as a container into which the mixture of the two liquids may be poured. The cap 4 may also include a dosing step that serves as an indicator for a dosing amount of the combination of liquids poured from the chambers 2 a and 2 b.

While example systems, methods, and so on, have been illustrated by describing examples, and while the examples have been described in considerable detail, it is not the intention to restrict or in any way limit the scope of the appended claims to such detail. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the systems, methods, and so on, described herein. Additional advantages and modifications will readily appear to those skilled in the art. Therefore, the invention is not limited to the specific details, and illustrative examples shown or described. Thus, this application is intended to embrace alterations, modifications, and variations that fall within the scope of the appended claims. Furthermore, the preceding description is not meant to limit the scope of the invention. Rather, the scope of the invention is to be determined by the appended claims and their equivalents.

To the extent that the term “includes” or “including” is employed in the detailed description or the claims, it is intended to be inclusive in a manner similar to the term “comprising” as that term is interpreted when employed as a transitional word in a claim. Furthermore, to the extent that the term “or” is employed in the detailed description or claims (e.g., A or B) it is intended to mean “A or B or both”. When the applicants intend to indicate “only A or B but not both” then the term “only A or B but not both” will be employed. Thus, use of the term “or” herein is the inclusive, and not the exclusive use. See, Bryan A. Garner, A Dictionary of Modern Legal Usage 624 (3D. Ed. 1995). 

What is claimed is:
 1. A multi-chambered bottle comprising: first and second chambers; a metering stage including: first and second metering stage sections connected to respective mouths of the first and second chambers and separated by a normal-center plane of the bottle, each metering stage section corresponding to a respective one of the first and second chambers, each metering stage section comprising: a nozzle that tapers to a liquid outlet orifice as it extends from a liquid inlet orifice along a longitudinal axis of the bottle, and a rim portion that surrounds the liquid outlet orifice, and a vent tube having an air inlet orifice and an air outlet orifice at opposite ends of the vent tube, the air inlet orifice disposed outside of the respective chamber and the air outlet orifice disposed inside of the respective chamber, the vent tube disposed relative to the nozzle such that a line crossing a center of the air inlet orifice and a center of the liquid outlet orifice forms an acute angle with a line crossing the center of the liquid outlet orifice and parallel to a normal axis of the bottle; and a pour spout releasably attachable relative to the metering stage and including: first and second pouring channels, each pouring channel corresponding to a respective one of the nozzles of the first and second metering stage sections, each pouring channel including: a liquid inlet that connects to the respective nozzle, and a liquid outlet that has an opening that narrows as the opening extends away from the normal-center plane of the bottle along a latitudinal axis of the bottle, a stepped rim that surrounds at least a portion of the opening and a divider disposed adjacent a portion of the opening nearest to the normal-center plane of the bottle, wherein at least a portion of a wall of the pouring channel slopes in a direction towards the normal-center plane of the bottle as it extends from the liquid inlet to the liquid outlet.
 2. The bottle of claim 1, wherein one of the first and the second chambers includes a first nesting portion that protrudes from the one of the first and the second chambers and the other of the first and the second chambers includes a second nesting portion that accepts the first nesting portion.
 3. The bottle of claim 1, wherein the rim portion that surrounds the liquid outlet orifice of the nozzle includes a tubular wall that intersects a widest portion of the nozzle.
 4. The bottle of claim 1, wherein, in at least one of the metering stage sections, a distance from the liquid outlet orifice of the nozzle to the air outlet orifice of the vent tube along the longitudinal axis of the bottle corresponds to at least one of 10% of the height of the chamber, 20% of the height of the chamber, 30% of the height of the chamber, 40% of the height of the chamber, from 25% to 33% of the height of the chamber, from 20% to 40% of the height of the chamber, from 10% to 60% of the height of the chamber, or from 5% to 90% of the height of the chamber.
 5. The bottle of claim 1, wherein, in at least one of the metering stage sections, the liquid outlet orifice of the nozzle and the air inlet orifice of the vent tube are same distance from the base of the chamber.
 6. The bottle of claim 1, wherein, in at least one of the metering stage sections, the liquid outlet orifice of the nozzle and the air inlet orifice of the vent tube are same distance from the base of the chamber, and a distance from the center of the liquid outlet orifice of the nozzle to the center of the air inlet orifice of the vent tube corresponds to at least one of 5% length of the vent tube, 10% of the length of the vent tube, 20% of the length of the vent tube, 25% of the length of the vent tube, 33% of the length of the vent tube, 50% of the length of the vent tube, from 10% to 25% of the length of the vent tube, or from 5% to 50% of the length of the vent tube.
 7. The bottle of claim 1, wherein the acute angle formed by the line crossing the center of the air inlet orifice and the center of the liquid outlet orifice with the line crossing the center of the liquid outlet orifice and parallel to the normal axis of the bottle for the first metering stage section is different from the acute angle formed by the line crossing the center of the air inlet orifice and the center of the liquid outlet orifice with the line crossing the center of the liquid outlet orifice and parallel to the normal axis of the bottle for the second metering stage section.
 8. The bottle of claim 1, wherein, in at least one of the metering stage sections, the air outlet orifice is formed by a flange expanding radially inwards from a wall of the vent tube such that a diameter of the air outlet orifice is smaller than an inner diameter of the vent tube adjacent to the flange.
 9. The bottle of claim 1, the metering stage comprising: at least one guide tab disposed between the metering stage sections, wherein the pour spout has a surface corresponding to the guide tab such that the guide tab contacts the surface and assists in aligning the pour spout and the metering stage when the pour spout is being installed on the bottle.
 10. The bottle of claim 1, wherein at least a portion of the wall of the pouring channel slopes in a direction away from a latitudinal-center plane of the bottle as it extends from the liquid inlet to the liquid outlet.
 11. The bottle of claim 1, comprising: a cap releasably attachable relative to the pour spout, wherein portions of the cap correspond to the liquid outlets of the pour spout including the stepped rims and the dividers such that when the cap is installed on the bottle the portions of the cap impede liquid flow through the liquid outlets of the pour spout.
 12. The bottle of claim 1, comprising at least one of a spacer or a foil removably disposed between the metering stage and the pour spout for storage and covering at least the air inlet orifices of the vent tubes and the liquid outlet orifices of the nozzles.
 13. A metering stage for a multi-chambered bottle including first and second chambers, the metering stage comprising: first and second metering stage sections connectable to respective mouths of the first and second chambers such that the first and second metering stage sections are separated by a normal-center plane of the bottle, each metering stage section corresponding to a respective one of the first and second chambers, each metering stage section comprising: a nozzle having a liquid inlet orifice and a liquid outlet orifice, and a vent tube having an air inlet orifice and an air outlet orifice at opposite ends of the vent tube, the air inlet orifice to be disposed outside of the respective chamber and the air outlet orifice to be disposed inside of the respective chamber, the vent tube disposed relative to the nozzle such that a line crossing a center of the air inlet orifice and a center of the liquid outlet orifice forms an acute angle with a line crossing the center of the liquid outlet orifice and parallel to a normal axis of the bottle.
 14. The metering stage of claim 13, wherein at least one of the nozzles of the first and second metering stage sections includes a rim portion that at least partially surrounds the liquid outlet orifice to collect liquid from the liquid outlet orifice.
 15. The metering stage of claim 14, wherein the rim portion completely surrounds the liquid outlet orifice.
 16. The metering stage of claim 13, wherein, in at least one of the metering stage sections, the liquid outlet orifice of the nozzle and the air inlet orifice of the vent tube are same distance from a main body of the metering stage section.
 17. The metering stage of claim 13, wherein, in at least one of the metering stage sections, the liquid outlet orifice of the nozzle and the air inlet orifice of the vent tube are same distance from a main body of the metering stage section and a distance from the center of the liquid outlet orifice of the nozzle to the center of the air inlet orifice of the vent tube corresponds to at least one of 5% length of the vent tube, 10% length of the vent tube, 20% length of the vent tube, 25% length of the vent tube, 33% length of the vent tube, 50% length of the vent tube, from 10% to 25% length of the vent tube, and from 5% to 50% length of the vent tube.
 18. The metering stage of claim 13, wherein the acute angle formed by the line crossing the center of the air inlet orifice and the center of the liquid outlet orifice with the line crossing the center of the liquid outlet orifice and parallel to the normal axis of the bottle for the first metering stage section is different from the acute angle formed by the line crossing the center of the air inlet orifice and the center of the liquid outlet orifice with the line crossing the center of the liquid outlet orifice and parallel to the normal axis of the bottle for the second metering stage section.
 19. The metering stage of claim 13, wherein, in at least one of the metering stage sections, the air outlet orifice is formed by a flange expanding radially inwards from a wall of the vent tube such that a diameter of the air outlet orifice is smaller than an inner diameter of the vent tube adjacent to the flange.
 20. The metering stage of claim 13, wherein first and second metering stage sections are joined by a bridge section such that the metering stage connected to the mouths of the first and second chambers acts as a structural entity that at least in part keeps the first and second chambers together.
 21. A pour spout for a multi-chambered bottle including first and second chambers, the pour spout comprising: first and second pouring channels, each pouring channel corresponding to a respective nozzle of a metering stage of the multi-chambered bottle, each pouring channel including: a liquid inlet connectable to the respective nozzle, and a liquid outlet that has an opening that narrows as the opening extends away from the normal-center plane of the bottle along a latitudinal axis of the bottle, wherein at least a portion of a wall of the pouring channel slopes in a direction towards a normal-center plane of the bottle as it extends from the liquid inlet to the liquid outlet and in a direction away from a latitudinal-center plane of the bottle as it extends from the liquid inlet to the liquid outlet.
 22. The pour spout of claim 21 including a grip for a finger of a user, the grip configured to promote that the user tilts the bottle a range of 45 degrees from a position in which first and second chambers of the bottle would be even with respect to the direction of gravity.
 23. The pour spout of claim 21 comprising: a stepped rim that surrounds at least a portion of the opening and a divider disposed adjacent a portion of the opening nearest to the normal-center plane of the bottle. 